Updated sill descriptions in documentation, updated spatial dependenc…#490

SimonMolinsky merged 1 commit intodevDataverseLabs/pyinterpolate:devfrom

489-buginconsistent-definition-of-sill-parameter-in-build_theoretical_variogramDataverseLabs/pyinterpolate:489-buginconsistent-definition-of-sill-parameter-in-build_theoretical_variogramCopy head branch name to clipboard